Toxic Metallic Contamination in Wastewater of Some Industrial Areas of Mymensingh Town, Bangladesh
Toxic Metallic Contamination in Wastewater of Some Industrial Areas of Mymensingh Town, Bangladesh
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孟加拉国迈门辛镇部分工业区废水中有毒金属污染
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Md. Mahidul Islam
中科院分区：
文献类型：
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作者：
M. S. Hossain;H. M. Zakir;M. S. Rahman;Md. Mahidul Islam
工业废物的处理是主要问题，也是造成土壤和水污染的原因。孟加拉国的迈门辛镇在过去几十年中由于人口过多，快速工业化和城市化而非常容易受到环境污染。在孟加拉国农业大学农业化学系进行了一项研究，以评估金属（铜，锌，铅，铁，锰，镉）的污染水平和一些工业区的Mymensingh镇的废水的物理化学性质。采用原子吸收分光光度计（AAS）对研究区24个废水样品中的金属元素进行了测定。废水样品中Fe、Mn、Zn、Cu和Pb的平均浓度分别为0.20、0.20、0.03、0.02和0.25 µg mL-1，而Cd的含量为痕量。其中，铅在废水样品中占主导地位，所有样品都超过了最高可接受水平，这使得它们不适合于不同的用途。废水样品中Ca 2、Mg 2、Na、K、Cl-、HCO 3-、BO 33-、PO 43-和SO 42-的平均浓度分别为112.39、27.55、101.93、19.26、213.41、559.37、0.56、23.72和32.90 µg mL-1。就Cl-、HCO 3-、PO 43-和SO 42-含量而言，大部分废水样品被发现对灌溉有问题。研究结果显示，废水中的高含量铅可能对周围环境造成各种健康危害。
Disposal of industrial waste is the major problem and responsible for soil and water pollution. Mymensingh town in Bangladesh is highly susceptible to environmental pollution due to over population, rapid industrialization and urbanization in last decades. A study was conducted at the Department of Agricultural Chemistry, Bangladesh Agricultural University, Mymensingh-2202 to assess metallic (Cu, Zn, Pb, Fe, Mn, Cd) contamination level and physicochemical properties of wastewater of some industrial areas of Mymensingh town. Total 24 wastewater samples were collected from the study area and the concentrations of metals in wastewater samples were determined by Atomic Absorption Spectrophotometer (AAS). The mean concentrations of Fe, Mn, Zn, Cu and Pb in wastewater samples were 0.20, 0.20, 0.03, 0.02 and 0.25 µg mL-1, respectively while the amount of Cd was trace. Among the metals, Pb was dominant in wastewater samples and all samples were exceeded the maximum acceptable level, which make them unsuitable for different usages. The mean concentration of Ca2, Mg2, Na, K, Cl-, HCO3-, BO33-, PO43- and SO42- in wastewater samples were 112.39, 27.55, 101.93, 19.26, 213.41, 559.37, 0.56, 23.72 and 32.90 µg mL-1, respectively. In respect of Cl-, HCO3-, PO43- and SO42- content most of the wastewater samples were found problematic for irrigation. The study results concluded that high amount of Pb in wastewater may pose various health hazards to the surrounding environment.